- Implemented StageSurfaceColorDialog for custom color selection with live preview.
- Created StageBackgroundGround class for non-walkable scenery behind the set.
- Introduced StageRectSurface for shared rectangular geometry and tint preview.
- Added StageSurfacePreview for rendering surface previews.
- Developed comprehensive tests for surface color selection, rendering, and serialization.
- Created three new scene files: `wobble.scene`, `wobble2.scene`, and `wobble3.scene` with various terrain and prop configurations.
- Introduced `stage_impact_resolver.gd` script to manage impact detection and response between props and stickmen.
- Added unit tests for actor blocking overlap to ensure proper interaction with stationary props.
- Introduced `StageUseTargetCaptureBar` class for managing user interactions with props and their use spots.
- Implemented UI elements including buttons for changing props and canceling actions.
- Added `PropUseSpotData` class for validation and serialization of prop use spots.
- Created tests for validating use spot data migration, serialization, and rule matching.
- Ensured proper handling of edge cases in use spot data, including unique IDs and finite positions.
- Implement `StageTargetCaptureSession` for managing target capture sessions with throw and set down positions.
- Create `StageTerrainPainter` for terrain drag painting and overlap classification with stroke preview.
- Introduce `StageThemeController` to handle theme values and resource loading for the Sandbox Stage.
- Develop `StageRuleEngine` for runtime event matching and collision bookkeeping.
- Add `StageSpatialIndex` for broadphase stage lookups with advisory spatial indexing.
- Added UI/UX specification for prop roles and set down mechanics in phase 17a.
- Created `PropStageRoles` script to manage normalized behavior for props, including depth, motion, and collision settings.
- Introduced `StagePhysicsPolicy` for shared physics configurations related to props and actors.
- Developed comprehensive tests for prop roles, including default settings, legacy migration, serialization, and runtime behavior.
- Ensured proper handling of set down actions, including clearance and orientation preservation.
- Introduced a new action type `move_to` allowing children to direct a stickman to a destination using either Walk or Run styles.
- Updated the ActionEditor UI to include Walk/Run buttons for selecting movement styles.
- Ensured compatibility with existing `walk_to` actions by converting them to the new `move_to` format during loading.
- Defined clear success criteria for the implementation, including distinct movement animations and behavior for both Walk and Run.
- Established a comprehensive verification contract to ensure functionality across various terrains and scenarios.